package com.rljk.utils;

import java.text.DateFormat;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.LocalDateTime;
import java.time.temporal.ChronoUnit;
import java.util.Calendar;
import java.util.Date;


/**
 * 说明：日期处理 创建人：FH Q313596790 修改时间：2015年11月24日
 * 
 * @version
 */
public class DateUtil {

	private final static SimpleDateFormat sdfYear = new SimpleDateFormat("yyyy");
	private final static SimpleDateFormat sdfDay = new SimpleDateFormat("yyyy-MM-dd");
	private final static SimpleDateFormat sdfDays = new SimpleDateFormat("yyyyMMdd");
	private final static SimpleDateFormat sdfTime = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
	private final static SimpleDateFormat sdfTimes = new SimpleDateFormat("yyyyMMddHHmmss");
	private final static SimpleDateFormat sdfHFM = new SimpleDateFormat("yyyyMMddHHmmssSSS");
	private final static SimpleDateFormat sdfUnix = new SimpleDateFormat("dd/MM/yyyy HH:mm:ss");
	private final static SimpleDateFormat sdfMonth = new SimpleDateFormat("MM");
	private final static SimpleDateFormat sdfDate = new SimpleDateFormat("dd");

	/**
	 * 获取YYYY格式
	 * 
	 * @return
	 */
	public static String getSdfTimes() {
		return sdfTimes.format(new Date());
	}

	/**
	 * 获取YYYY格式
	 * 
	 * @return
	 */
	public static String getYear() {
		return sdfYear.format(new Date());
	}
	
	/**
	 * 获取当前月份
	 * 
	 * @return
	 */
	public static String getMonth() {
		return sdfMonth.format(new Date());
	}
	
	/**
	 * 获取当前日期
	 * 
	 * @return
	 */
	public static String getDate() {
		return sdfDate.format(new Date());
	}

	/**
	 * 获取YYYY-MM-DD格式
	 * 
	 * @return
	 */
	public static String getDay() {
		return sdfDay.format(new Date());
	}

	/**
	 * 获取YYYYMMDD格式
	 * 
	 * @return
	 */
	public static String getDays() {
		return sdfDays.format(new Date());
	}

	/**
	 * 获取YYYY-MM-DD HH:mm:ss格式
	 * 
	 * @return
	 */
	public static String getTime() {
		return sdfTime.format(new Date());
	}
	
	/**
	 * 获取YYYY-MM-DD HH:mm:ss格式
	 * 
	 * @return
	 */
	public static String dateToString(Date date) {
		return sdfTime.format(date);
	}

	/**
	 * 获取DD/MM/YYYY HH:mm:ss格式(Unix时间戳转换格式)
	 * 
	 * @return
	 */
	public static String getUnix(String date) {
		return sdfUnix.format(date);
	}

	/**
	 * @Title: compareDate
	 * @Description: TODO(日期比较，如果s>=e 返回true 否则返回false)
	 * @param s
	 * @param e
	 * @return boolean
	 * @throws @author
	 *             fh
	 */
	public static boolean compareDate(String s, String e) {
		if (fomatDate(s) == null || fomatDate(e) == null) {
			return false;
		}
		return fomatDate(s).getTime() >= fomatDate(e).getTime();
	}

	/**
	 * 格式化日期yyyy-MM-dd
	 * 
	 * @return
	 */
	public static Date fomatDate(String date) {
		DateFormat fmt = new SimpleDateFormat("yyyy-MM-dd");
		try {
			return fmt.parse(date);
		} catch (ParseException e) {
			e.printStackTrace();
			return null;
		}
	}
	
	/**
	 * 将yyyyMMddHHmmss转化为Date
	  * @Description
	  * @Author zhaozhenhua
	  * @date   2018年5月11日
	  * @return
	  * @throws Exception
	 */
	public static Date stringToDate(String date) {
		try {
			SimpleDateFormat sdf1 = new SimpleDateFormat("yyyyMMddHHmmss");
			Date format;
			format = sdf1.parse(date);
			return format;
		} catch (ParseException e) {
			e.printStackTrace();
		}
		return null;
}
	
	

	/**
	 * 校验日期是否合法
	 * 
	 * @return
	 */
	public static boolean isValidDate(String s) {
		DateFormat fmt = new SimpleDateFormat("yyyy-MM-dd");
		try {
			fmt.parse(s);
			return true;
		} catch (Exception e) {
			// 如果throw java.text.ParseException或者NullPointerException，就说明格式不对
			return false;
		}
	}

	/**
	 * @param startTime
	 * @param endTime
	 * @return
	 */
	public static int getDiffYear(String startTime, String endTime) {
		DateFormat fmt = new SimpleDateFormat("yyyy-MM-dd");
		try {
			// long aa=0;
			int years = (int) (((fmt.parse(endTime).getTime() - fmt.parse(startTime).getTime()) / (1000 * 60 * 60 * 24))
					/ 365);
			return years;
		} catch (Exception e) {
			// 如果throw java.text.ParseException或者NullPointerException，就说明格式不对
			return 0;
		}
	}

	/**
	 * <li>功能描述：时间相减得到天数
	 * 
	 * @param beginDateStr
	 * @param endDateStr
	 * @return long
	 * @author Administrator
	 */
	public static long getDaySub(String beginDateStr, String endDateStr) {
		long day = 0;
		SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
		Date beginDate = null;
		Date endDate = null;

		try {
			beginDate = format.parse(beginDateStr);
			endDate = format.parse(endDateStr);
		} catch (ParseException e) {
			e.printStackTrace();
		}
		day = (endDate.getTime() - beginDate.getTime()) / (24 * 60 * 60 * 1000);
		// System.out.println("相隔的天数="+day);

		return day;
	}

	/**
	 * 得到n天之后的日期
	 * 
	 * @param days
	 * @return
	 */
	public static String getAfterDayDate(String days) {
		int daysInt = Integer.parseInt(days);

		Calendar canlendar = Calendar.getInstance(); // java.util包
		canlendar.add(Calendar.DATE, daysInt); // 日期减 如果不够减会将月变动
		Date date = canlendar.getTime();

		SimpleDateFormat sdfd = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		String dateStr = sdfd.format(date);

		return dateStr;
	}

	/**
	 * 得到n天之后是周几
	 * 
	 * @param days
	 * @return
	 */
	public static String getAfterDayWeek(String days) {
		int daysInt = Integer.parseInt(days);
		Calendar canlendar = Calendar.getInstance(); // java.util包
		canlendar.add(Calendar.DATE, daysInt); // 日期减 如果不够减会将月变动
		Date date = canlendar.getTime();
		SimpleDateFormat sdf = new SimpleDateFormat("E");
		String dateStr = sdf.format(date);
		return dateStr;
	}

	

	/**
	 * 获取yyyyMMddHHmmssS格式
	 * 
	 * @return
	 */
	public static String getdaySFM() {
		return sdfHFM.format(new Date());
	}

	/**
	 * 获取精确到秒的Unix时间戳
	 * 
	 * @param DateTime
	 *            过期时间
	 * @return
	 */
	public static long getUnixTime(String DateTime) {
		Date date = null;
		try {
			date = sdfTime.parse(DateTime);
		} catch (ParseException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		long time = date.getTime() / 1000L;
		return time;

	}

	/**
	 * 获取多少秒之后的时间
	 * 
	 * @param seconds
	 *            多少秒之后
	 * @return
	 */
	public static String getTimeWithSecond(Integer seconds) {
		Calendar now = Calendar.getInstance();
		now.add(Calendar.SECOND, seconds);
		String dateStr = sdfTime.format(now.getTimeInMillis());
		return dateStr;

	}
	
	/**
	 * 获取n天之前的时间
	 * 
	 * @param days
	 *            几天
	 * @return
	 */
	public static String getBeforeWithDays(Integer days) {
		Calendar now = Calendar.getInstance();
		now.add(Calendar.DATE, -days);
		String dateStr = sdfTime.format(now.getTimeInMillis());
		return dateStr;

	}
	
	/**
	 * 获取多少秒之前的时间
	 * 
	 * @param second
	 *            多少秒
	 * @return
	 */
	public static String getBeforeWithSecond(Integer second) {
		Calendar now = Calendar.getInstance();
		now.add(Calendar.SECOND, -second);
		String dateStr = sdfTime.format(now.getTimeInMillis());
		return dateStr;

	}
	
	/**
	 * 获取n天之前的日期
	 * 
	 * @param days
	 *            几天
	 * @return
	 */
	public static String getBeforeDays(Integer days) {
		Calendar now = Calendar.getInstance();
		now.add(Calendar.DATE, -days);
		String dateStr = sdfTime.format(now.getTimeInMillis());
		dateStr= dateStr.substring(0,10);
		return dateStr;

	}
	
	/**
	 * 获取还有多少秒到第二天
	 * @return
	 */
	public static Integer getSecondsToTomorrow(){
		LocalDateTime midnight = LocalDateTime.now().plusDays(1).withHour(0).withMinute(0).withSecond(0).withNano(0);
		long seconds = ChronoUnit.SECONDS.between(LocalDateTime.now(), midnight);
		return new Long(seconds).intValue();
	}
	
	/**
	 * 获取还有多少秒到下周一
	 * @return
	 */
	public static Integer getSecondsToWeek(){
		//获取当前星期几
		LocalDateTime midnight = LocalDateTime.now().plusWeeks(1).withHour(0).withMinute(0).withSecond(0).withNano(0);
		//获取距离下周一还剩的秒数
		LocalDateTime withNano = LocalDateTime.now().plusDays(midnight.getDayOfWeek().getValue()).withHour(0).withMinute(0).withSecond(0).withNano(0);
		long seconds = ChronoUnit.SECONDS.between(LocalDateTime.now(), withNano);
		return new Long(seconds).intValue();
	}
	
	/**
	 * 获取还有多少秒到下月1号
	 * @return
	 */
	public static Integer getSecondsToMonth(){
		LocalDateTime midnight = LocalDateTime.now().plusMonths(1).withDayOfMonth(1).withHour(0).withMinute(0).withSecond(0).withNano(0);
		long seconds = ChronoUnit.SECONDS.between(LocalDateTime.now(), midnight);
		return new Long(seconds).intValue();
	}
	
	
	public static void main(String[] args) {
		System.out.println(DateUtil.getSecondsToTomorrow());
		System.out.println(DateUtil.getTimeWithSecond(1851377));
	}

}


